evie/android_kernel_oneplus_msm8998
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msm: mdss: fix issues with transition from LP3 to LP2

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When transitioning from LP3 power state to LP2 power state, reset
the flag to indicate that the interface is active again and can accept
updates. This ensures that all the interface clocks are correctly turned
back during the subsequent display update.

Change-Id: Ia3e90a5e9da7432529a9dd5ca3c5690b8d6c2af0
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
This commit is contained in:
Aravind Venkateswaran 2014-12-19 17:21:49 -08:00 • committed by David Keitel
parent 8100cb00f3
commit 47fc8d8adf
1 changed files with 7 additions and 4 deletions
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11
drivers/video/fbdev/msm/mdss_mdp_intf_cmd.c
View file

@ -1157,11 +1157,13 @@ int mdss_mdp_cmd_stop(struct mdss_mdp_ctl *ctl, int panel_power_state)
} else {
/*
* Transition from ultra low power to low power does
* not require any special handling. The clocks would
* not require any special handling. Just rest the
* intf_stopped flag so that the clocks would
* get turned on when the first update comes.
*/
pr_debug("%s: nothing to be done.\n", __func__);
return 0;
pr_debug("%s: reset intf_stopped flag.\n", __func__);
ctx->intf_stopped = 0;
goto end;
}
}
@ -1197,7 +1199,6 @@ panel_events:
WARN(ret, "intf %d unblank error (%d)\n", ctl->intf_num, ret);
}
ctx->panel_power_state = panel_power_state;
if (!panel_off) {
pr_debug("%s: cmd_stop with panel always on\n", __func__);
@ -1213,6 +1214,8 @@ panel_events:
ctl->remove_vsync_handler = NULL;
end:
if (!IS_ERR_VALUE(ret))
ctx->panel_power_state = panel_power_state;
MDSS_XLOG(ctl->num, atomic_read(&ctx->koff_cnt), ctx->clk_enabled,
ctx->rdptr_enabled, XLOG_FUNC_EXIT);
pr_debug("%s:-\n", __func__);